This is the most unnecessarily expensive and convoluted solution. Every product would have to be updated to support this system and it only works with electrical devices.
Here's a better idea. If a product is liable to be stolen, just keep it locked up and require the clerk to get it for you at checkout. It's probably less work for the clerk to do that than fiddle with this new system and it would require much less error-prone technology or cooperation from manufacturers. Most stores figured this out decades ago.
i liked what office (depot|max) did... one demo item on display to explorer. if you're ready to purchase there is a slip you take to the counter and the cashier pulls the item for you.
fry's electronic / cosco has people at the door searching every customer and checking their documentation. i believe you can tell them to fuk off. "can i see your receipt?" "no" lol.
Here's a better idea. If a product is liable to be stolen, just keep it locked up and require the clerk to get it for you at checkout. It's probably less work for the clerk to do that than fiddle with this new system and it would require much less error-prone technology or cooperation from manufacturers. Most stores figured this out decades ago.